Yahoo 2019-02

1 Two Sum

347 Top K Frequent Elements

49 Group Anagrams

503 Next Greater Element II

331 Verify Preorder Serialization of a Binary Tree

146 LRU Cache

162 Find Peak Element

362 Design Hit Counter

21 Merge Two Sorted Lists

274 H-Index

46 Permutation

295 Find Median from Data Stream

72 Edit Distance

166 Fraction to Recurring Decimal

567 Permutation in String

260 Single Number III

200 Number of Islands

238 Product of Array Except Self

518 Coin Change 2

450 Delete node in a BST

95 Unique Binary Search Trees II

211 Add and Search Word - Data structure design

269 Alien Dictionary

204 Count Primes

141 Linked List Cycle

451 Sort Characters By Frequency

273 Integer to English Words

75 Sort Colors

692 Top K Frenquent Words

394 Decode String

120 Triangle

181 Employees Earning More Than Their Managers

34 Find First and Last Position of Element in Sorted Array

160 Intersection of Two Linked Lists

242 Valid Anagram

15 3 Sum

22 Generate Parentheses

205 Isomorphic Strings

5 Longest Palindromic Substring

23 Merge k Sorted Lists

92 Reverse Linked List II

105 Construct Binary Tree from Preorder and inorder Traversal

297 Serialize and Deserialize Binary Tree

91 Decode Ways

7 Reverse Integer

13 Roman to Integer

176 Second Highest Salary

14 Longest Common Prefix

287 Find the Duplicate Number

79 Word Search

138 Copy List with Random Pointer

103 Binary Tree Zigzag Level Order Trversal

108 Convert Sorted Array to Binary Search Tree

9 Palindromic Number

139 Word Break

112 Path Sum

905 Sort Array By Parity

78 Subsets

387 First Unique Character in a String

3 Longest Substring Without Repeating Characters

8 String to Integer (atoi)

102 Binary Tree Level Order Traversal

56 Merge Intervals

122 Best Time to Buy and Sell Stock II

104 Maximum Depth of Binary Tree

70 Climbing Stairs

20 Valid Parentheses

206 Reverse Linked List